The negative pressure resistance of a hose refers to the ability of the hose to maintain its structural integrity and function properly when it is subjected to negative pressure (i.e., the internal pressure is lower than the external pressure). Under negative pressure, problems such as air penetration and hose wall rupture may occur inside the hose.
The importance of the negative pressure resistance of a hose
The negative pressure resistance of a hose determines the stability and reliability of the hose in a vacuum or negative pressure environment. Specifically, a hose with strong negative pressure resistance can better resist problems such as internal air penetration and hose wall rupture. This ensures that it can maintain normal working conditions in a negative pressure environment without adsorption, leakage, etc. This is crucial for many industrial, medical and scientific research applications. For example, when conveying liquids, gases or powders, the hose needs to withstand a certain negative pressure. This ensures that the fluid will not leak or flow back.
How to distinguish if a hose has negative pressure resistance
There is a simple way to recognize whether a hose has negative pressure resistance or not. That is to check the reinforce layer. If a hose has multi-ply of reinforce layer, it will have certain negative pressure resistance. While that will vary because of the reinforce layer material. But in general, the stronger the hose structure is, the better the negative pressure resistance it will have.